My Son May Be Seeing Spirits

I'm not sure this is a story so much as it is asking as to what others think might be going on.

The house we live in was bought by my husband about 4 years before we met and married. Upon moving in, he said he had odd things happening, like the radio or lights coming on during the night. He got really ticked and announced (using explicative's, I might add) that this was his house, and that anybody else there needed to leave. He's had no problems since, and I haven't experienced anything either.

We're in the process of moving, so our 3 year old son and I spend most of our time at my parents' house since we'll be moving to that city. Last week we had to come back down to the house because my Mother-in-Law passed away after battling cancer.

When we got there, my son didn't even want to go into the house. We played outside for over an hour. Once we got in, he kept himself in his room, and the only other room he would voluntarily go into was ours. Any time we have him go into another room he looks all over and wants us to stay with him. My parents came down to stay with us and help out and at one point my son and mother were in the living room and he asked her if she was scared. She said no and asked if he was. He said yes and then wanted to know where I was.

Because of my mother-in-law's passing, my husband's siblings and their children were staying at his mother's house for the funeral. We went there one night and my son had a fit when we pulled into the driveway. I told him it would be okay and held him as we walked into the house. He got very upset and struggled to get out of my arms and out of the house. I got out his stroller and we walked around the block for awhile. We eventually went back in, but he was still a bit upset though not as much as he was earlier. We rounded up some toys and he was okay. Even though I know it's not necessarily funny, I still chuckled when I asked him if he was ready to go and he said, "okay!" without hesitation and quickly gathered the toys he brought. I should mention too that she was living there prior to her surgery in April, and a few months before that he was not very happy visiting there even back then.

I usually end up staying with him during the night, so he hasn't had any problems. He's been okay taking his naps though there have been a couple of times this past week that he's woken up upset.

Yesterday I figured that if there was a spirit (Possibly my MIL) visiting us, I had better ask them to leave. So while I was in the laundry room I said, "If there is anybody visiting us, I need to politely ask you to leave. Even though you may not mean to, you are scaring my son. I don't want to be rude, but I want you to please leave without incident."

Right now my son is still clingy, but he seems to be a bit more comfortable. One thing I noticed yesterday was that when I carried him into the kitchen, he was staring fearfully into one of the corners. My Mom said that whenever he ventured out of his room while they were here he would look around each room very intensely.

Another thing I should mention is that just prior to my mother-in-law's passing we were all at my parents' house. The night before my husband got the call to come home, a few odd things were happening at my parents' house. We'd hear banging or what sounded like things dropping. My husband figured it was his already deceased father telling him that something was about to happen. I believe that to be the case, but we were up there to watch their dogs, and none of them reacted to this. I would have thought they would have growled or something. We had our beagle at our house during most of this, and she doesn't seem to be affected by it either.

The last time my son and I were at the house was about 3 weeks ago. My husband was gone (he works every other week, and is gone for the entire week), and I was painting primer on some of the interior walls. He had no fears during that time.

Does anybody else think that there's a spirit in our house? Any feedback would be appreciated.